Multiple drill.



' I A. EDEN, In. MULTIPLE DRILL. APPLICATION man OCT-29. 1913.

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THE NORRIS PETERS- C0, PHOTO LITHO- WASHINGTDN, DUC

J. A. EDEN, In.

MULTIPLE DRILL. APPLICATION FILED OCT-29, ma.

Patented Apr. 6, 1915.

a aH3nTssnnnT z W, a firm; By mmy THE NORRIS PETERS CO FHOTO-LITHD., WASHING KIN, D. C.

J. A. EDEN, JR.

MULTIPLE DRILL. APPLICATION FILED OCT-29. 1-913.

Patented Apr. 6, 1915. E U5; 3SHEETS-SHEBT3 A TTO/f/VEY THE NORRIS PETERS CO, FHOTO-LITHQ, WASHINGTON, D. c.

JAMES A. EDEN, JR., 9F SPRINGFIELD, MASS ACI'IUSET'IS, ASSIGNOR TO BAUSI-I MACHINE TOOL COMFANY, A CORPORATION OF MASSACHUSETTS.

MULTIPLE DRILL.

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Specification of Letters Patent.

Patented Apr. 6, 1915.

Application filed. October 29, 1913. Serial No. 797,973.

To all whom it may concern Be it known that I, JAMEs A. EDEN, J r., a citizen of the United States, residing in Springfield, Massachusetts, have invented certain new and useful Improvements in Multiple Drills, of which the following is a specification.

This invention aims to provide certain improvements in drilling machines having a multiplicity of spindles, and especially in the means of adjusting the drills, whereby the drills may be adjusted anywhere within the head frame and may also be adjusted vertically, the present improvements being designed to make such adjustment easily and quickly, and to have certain other advantages referred to in detail hereinafter.

The accompanying drawings illustrate certain apparatus embodying the invention.

Figure l is a perspective view of a drilling machine to which the adjustable mechanism is applied; certain parts and adjustments not related to this invention being omitted; Fig. 2 is a vertical longitudinal section of a spindle-carrying arm applied to a portion of the head frame of the machine; the section being on the line 2-2, Fig. 4:; Fig. 3 is a side elevation, on a larger scale, of the arm shown in Fig. 2, with the central portion removed; Fig. at is a horizontal section of the same on the line 4-4, Fig. 3; Fig. 5 is a side elevation (partly in section) of another style of arm embodying the in vention; Fig. 6 is a horizontal section of the same on the line 66, Fig. 5; Fig. 7 is a side elevation (partly in section) of a third style of arm embodying the invention; Fig. 8 is a plan and Fig. 9 a horizontal section of the same on the line 9-9, Fig. 7.

Referring to the embodiments of the invention illustrated the drills A are mounted at their upper ends in spindles B which are carried in bearings upon the inner ends of arms C which are adjustably attached to the under face of a head frame D which carries oblique spindles E, the lower ends of which engage the upper ends of the drill spindles B to rotate the latter. The oblique spindles E are driven through gearing in the upper part of the head frame D which is operated by a vertical shaft F. The head frame 1) is usually adjustable on the pillar G of the ma chine, but the construction and mechanism for such adjustment are not illustrated, not being related to the present invention. Any

usual or suitable mechanism may be used for adjusting and driving the parts above de scribed. The present invention is directed to the adjustable arms which carry the drill spindles for this or other types of multiple drill machines.

Each arm G is provided with a longitudinal slot H (Figs. 2 and 3) extending through it from top to bottom. Bolts J (Fig. 2) pass through this slot, having their squared heads in rectangular grooves K in the head frame and having nuts L on their lower ends. The nuts being loosened, the arms may be shifted transversely to any desired position and the nuts then clamped to hold it. Two grooves K and two bolts J are provided for each arm, the slot H in the arm being sufiiciently long to permit any desired angular adjust ment as well as any desired adjustment longitudinally and transversely of the arm. These arms C are provided with clamps which may be released to permit longitudinal adjustment of their spindles and tightened to clamp the spindles in their desired longitudinal positions. The clamp at the inner end of each arm consists of two jaws, each approximately semi-cylindrical, embracing the cylindrical outer surface of a sleeve M which carries a drill spindle B with its upper end engaged by the lower end of an oblique driving spindle E. The sleeve M forms a bearing for the spindle and is made of sufficient length to permit its vertical adjustment in the clamp when the latter is released. One jaw N of the clamp is preferably formed by a dressed semicylindrical' inner end of the arm C. The outer movable member of the clamp consists of a strap 0 of thin flexible metal (Figs. 2, 3 and l) fastened at one end to one side of the arm C, passing around the sleeve M carrying rod or bolt and having a free end attached to an adjusting rod or bolt P which lies partly within a groove Q in the other side of the arm and extends to the outer end of the arm where it is guided in a lug R projecting slightly beyond the side of the arm. At its outer end the adjusting bolt is provided with a nut S.

By sufficiently unscrewing the nut S the clamping member 0 may be pushed open sufficiently to permit the complete withdrawal of the bearing sleeve M and bearing spindle carried thereby. The nuts L being then unscrewed the arm may be withdrawn from the head frame D and reversed right for left by inverting it, in which inverted position it may be again clamped to the head frame and clamped upon the spindle and adjusted as before. This reversibility, due to the fact that the arm and the clamp at its inner end are symmetrical about a horizontal plane (that is, the clamp-operating device is in line with the body of the arm, between the planes of the top and bottom edges of the arm), permits its use as a right handed arm or a left handed arm at will. This is of ad vantage because frequently it is necessary to drill two holes very close together and to place the arms in such positions that lateral projections, such as a lug R upon one arm, would interfere with the next arm. The same difliculty arises in every case in which the arm extends farther in a lateral direction at one side of the central longitudinal plane (the line 22 in Fig. i) than at the other. Vhere the arms can be reversed right and left, however, the narrower sides of two adjacent arms can be brought together without any space between them. The proper loca tions for the centers of the drills can often be reached in this way whereas if the arms were not reversible it would be necessary to make a special arm for the particular case.

The fixed jaw N of the clamp is located along the central longitudinal line of the arm so 'as to bring the center of the spindle on the same line, and the groove H through which pass the bolts for fastening the arms to the head frame is also on this central line. Thus the line of the strain due to the push of the drill is maintained central so that there is no tendency to tilt the arm laterally and the reaction or downward pressure upon the drill is directly in line with its longitudinal axis. This result is secured notwithstanding the lateral position of the bolt and nut which operate the clamp in Fig. 3, by making the clamp surround the spindle instead of clamping the latter only at the end of the bolt as has been done in previous constructions. Also in previous constructions the spindle, or the sleeve carrying the same, has been clamped by means of a pair of bolts at different points along its length. By the use of a cylindrical clamp engaging the sleeve of the spindle over a considerable portion of its length, with a single operating means for loosening and tightening such clamp the present apparatus provides for a much quicker vertical adjust- :ment of the spindle, and this adjustment in the embodiments of the invention illustrated isefiected at the most convenient points, namely, at the outer part of the arm.

In the embodiment of the invention illus trated in Figs. 5 and 6 the arm C is similar to that shown in Figs. 2 and 3. The movable member of the clamp, however, consists of a strap T, the middle portion of which screws central bolt or set-screw V, the in- 1 nor end of which bears against the outer end of the arm C. By turning the bolt V in one: direction or another the clamp is released or tightened.

The construction shown in Figs. 7, 8

and 9 is similar to that in Figs. 5 and 6 except for the means for operating the clamp. The movable member of the clamp is a strap T extending around the sleeve M which carries the spindle and in grooves along the sides of the arm, the end of the strap being fastened to a block W which has an inclined inner face. Between the inner face of this block W and the outer end of the arm C is a wedge X having a threaded upper end upon which is a nut Y bearing through a washer Z upon the block TV and upon the end of the arm C; so that by turning the nut Y in one direction or another the wedge is raised or lowered to tighten or loosen the clamp.

Though I have described with great particularity of detail certain specific embodiments of my invention yet it is not to be understood therefrom that the invention is restricted to the particular embodiments described. Various modifications thereof in detail and in the arrangement of the parts may be made within the scope of the claims by those skilled in the art.

lVhat I claim is:

1. A multiple drill machine including in combination a head frame, drill 'spin'dles'and spindle-carrying arm's adjustably carried by said frame, each of said arms having a clamp at the inner end adapted to be re;- leased to permit longitudinal adjustment of the spindle and to be tightened to clamp the spindle in a desired longitudinal position, the center of the spindle being in the longitudinal central line of the arm, and means at the outer end of the arm for operating said clamp. I

2. A multiple drill machine including in combination a head frameand spindle-carrying arms having one plane side and one side carrying a laterally-projecting portion of a clamping device, said arms being reversible on said frame so as to permit the bringing together of the plane sides of two adjacent arms. v

3. A. multiple drill machine including in combination ahead frame, drill spindles and spindle-carrying arms adjustably carried by foo the spindle in a desired longitudinal position.

4. A multiple drill machine including a head frame, drill spindles and spindle-carrying arms adjustably carried by said frame, each of said arms having a clamp at its inner end comprising a strap 0 of thin flexible metal embracing the spindle and adjusting means at the outer end of the arm engaging a free end of said strap.

5. A multiple drill machine including a head frame, drill spindles and spindle-carrying arms adjustably carried by said frame, each of said arms having a clamp at its inner end comprising a strap 0 of thin flexible metal fastened at one end to one side of said arm and embracing said spindle and having a free end, an adjusting bolt P lying within a groove at the other side of the arm and attached to the free end of said strap and an adjusting nut on the outer end of said bolt.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

D. ANTHONY UsINA, LULU STUBENWOLL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of ratents.

Washington, D. G. 

